package io.renren.util.weichuang;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class HttpReq {

    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("content-type", "application/x-www-form-urlencoded;charset=UTF-8");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 键值对参数,POST请求
     * 
     * @author 
     * @date 2016年3月14日
     */
    public static String httpRequest(String url, List<NameValuePair> params) throws ParseException, IOException {
        HttpPost httpRequest = null;
        httpRequest = new HttpPost(url);
        httpRequest.setHeader("Encoding", "utf-8");
        httpRequest.setHeader("content-type", "application/x-www-form-urlencoded;charset=UTF-8");
        httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
        HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
        if (httpResponse.getStatusLine().getStatusCode() == 200) {
            /* 取出响应字符串 */
            String strResult = EntityUtils.toString(httpResponse.getEntity());
            return strResult;
        } else {
            httpRequest.abort();
            return null;
        }
    }

    public static InputStream getInputStream(String urlPath) {
        InputStream inputStream = null;
        HttpURLConnection httpURLConnection = null;
        try {
            URL url = new URL(urlPath);
            if (url != null) {
                httpURLConnection = (HttpURLConnection) url.openConnection();
                // 设置连接网络的超时时间
                httpURLConnection.setConnectTimeout(3000);
                httpURLConnection.setDoInput(true);
                // 设置本次http请求使用get请求方式
                httpURLConnection.setRequestMethod("GET");
                int responsecode = httpURLConnection.getResponseCode();
                if (responsecode == 200) {
                    // 从服务器获得一个输入流
                    inputStream = httpURLConnection.getInputStream();
                }
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return inputStream;
    }
}
